One moment you are in a chess app moving pawn to K4 and the next second you find that you have accidentally clicked on one of these banners and have been directed to the app store.

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In chess, it is the equivalent of giving a pawn to capture a rook.

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Task World Chess Champion Viswanathan Anand with explaining every slide of a pawn or block of a bishop and he might lose sight of the board.

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